• State Resolved
  • Locked Locked
  • Replies 5 replies
  • Answers 1 answer
  • Subscribers 63 subscribers
  • Views 718 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

UCC25600: Current sense network calculation with split capacitors in ressonant tank

Israel Divan
Prodigy 165 points
Part Number: UCC25600

Hi everyone, i have one question about the design of my last project, smps LLC with UCC25600. I''ll go use split capacitors in  ressonant tank. How is the procediment of calculator of components of current sense network in this case?

Thank you so much!

  • 0
    TI__Mastermind 27085 points
    Hi Israel,

    Thanks for your interest in UCC25600. Using split capacitors should not change the current sense network. Cs and Rs function as a differentiator which measures the resonant current from the dV/dt of the resonant capacitance. D1 and D2 rectifies the AC signal from the differentiator.

    Best Regards,
    Ben Lough
  • 0 in reply to Benjamin Lough
    Prodigy 165 points
    Benjamin, thank you very much for the feedback and sorry for my bad English. So is the value of Cs and Rs following the sluc146? I have one more question about this project. What is the care to be taken for application in the LLC topology in oscillating loads with audio energy applications where consumption is variable at all times? Load gradients are characteristic in these applications mainly in loud musics.
  • 0 in reply to Israel Divan
    Prodigy 165 points
    Audio power amplifiers, I meant
  • 0 in reply to Israel Divan
    TI__Mastermind 27085 points
    Hi Israel,

    I think what you will want to consider is that audio output power is not equal to the power demand it will pull from your power supply. You will certainly need to design the LLC to handle peak power, but the LLC will not have to deliver peak power continuously. Audio power amplifiers are sensitive to variations in the power supply so you might consider putting a PI filter on your output to reduce the output ripple. Another item is your layout will have an impact on the performance of your audio system. From a power supply perspective, it is better to lay out the LLC output close to the load (the power amplifiers). You will want to keep the high frequency switching elements as far away as possible from the amplifiers.

    EE times did an article series regarding power supply design for audio systems that you might find interesting: www.eetimes.com/document.asp

    Best regards,
    Ben Lough
  • 0 in reply to Benjamin Lough
    Prodigy 165 points
    Thank you so much for support. You solve my problems, thanks!!